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<FONT color="green">001</FONT>    package metaface.server;<a name="line.1"></a>
<FONT color="green">002</FONT>    import javax.xml.parsers.*;<a name="line.2"></a>
<FONT color="green">003</FONT>    import org.xml.sax.*;<a name="line.3"></a>
<FONT color="green">004</FONT>    import org.xml.sax.helpers.*;<a name="line.4"></a>
<FONT color="green">005</FONT>    import java.io.*;<a name="line.5"></a>
<FONT color="green">006</FONT>    <a name="line.6"></a>
<FONT color="green">007</FONT>    /**<a name="line.7"></a>
<FONT color="green">008</FONT>     *  Error handler to report XML errors and warnings during VHML parsing<a name="line.8"></a>
<FONT color="green">009</FONT>     *<a name="line.9"></a>
<FONT color="green">010</FONT>     *@author     Simon Beard<a name="line.10"></a>
<FONT color="green">011</FONT>     *@version    1.0<a name="line.11"></a>
<FONT color="green">012</FONT>     *@see        VHMLParser<a name="line.12"></a>
<FONT color="green">013</FONT>     *@see        VHMLReader<a name="line.13"></a>
<FONT color="green">014</FONT>     */<a name="line.14"></a>
<FONT color="green">015</FONT>    class VHMLErrorHandler implements ErrorHandler {<a name="line.15"></a>
<FONT color="green">016</FONT>    <a name="line.16"></a>
<FONT color="green">017</FONT>            /**<a name="line.17"></a>
<FONT color="green">018</FONT>             *  Error handler output goes here<a name="line.18"></a>
<FONT color="green">019</FONT>             */<a name="line.19"></a>
<FONT color="green">020</FONT>            private PrintStream out;<a name="line.20"></a>
<FONT color="green">021</FONT>    <a name="line.21"></a>
<FONT color="green">022</FONT>    <a name="line.22"></a>
<FONT color="green">023</FONT>            /**<a name="line.23"></a>
<FONT color="green">024</FONT>             *  Construct the error handler<a name="line.24"></a>
<FONT color="green">025</FONT>             *<a name="line.25"></a>
<FONT color="green">026</FONT>             *@param  out  Description of the Parameter<a name="line.26"></a>
<FONT color="green">027</FONT>             */<a name="line.27"></a>
<FONT color="green">028</FONT>            VHMLErrorHandler(PrintStream out) {<a name="line.28"></a>
<FONT color="green">029</FONT>                    this.out = out;<a name="line.29"></a>
<FONT color="green">030</FONT>            }<a name="line.30"></a>
<FONT color="green">031</FONT>    <a name="line.31"></a>
<FONT color="green">032</FONT>    <a name="line.32"></a>
<FONT color="green">033</FONT>            /**<a name="line.33"></a>
<FONT color="green">034</FONT>             *  Returns a string describing parse exception details<a name="line.34"></a>
<FONT color="green">035</FONT>             *<a name="line.35"></a>
<FONT color="green">036</FONT>             *@param  spe  The SAX Parser Exception thrown<a name="line.36"></a>
<FONT color="green">037</FONT>             *@return      A string that identifies the error<a name="line.37"></a>
<FONT color="green">038</FONT>             */<a name="line.38"></a>
<FONT color="green">039</FONT>            private String getParseExceptionInfo(SAXParseException spe) {<a name="line.39"></a>
<FONT color="green">040</FONT>                    String systemId = spe.getSystemId();<a name="line.40"></a>
<FONT color="green">041</FONT>                    if (systemId == null) {<a name="line.41"></a>
<FONT color="green">042</FONT>                            systemId = "null";<a name="line.42"></a>
<FONT color="green">043</FONT>                    }<a name="line.43"></a>
<FONT color="green">044</FONT>                    String info = "URI=" + systemId +<a name="line.44"></a>
<FONT color="green">045</FONT>                                    " Line=" + spe.getLineNumber() +<a name="line.45"></a>
<FONT color="green">046</FONT>                                    ": " + spe.getMessage();<a name="line.46"></a>
<FONT color="green">047</FONT>                    return info;<a name="line.47"></a>
<FONT color="green">048</FONT>            }<a name="line.48"></a>
<FONT color="green">049</FONT>    <a name="line.49"></a>
<FONT color="green">050</FONT>    <a name="line.50"></a>
<FONT color="green">051</FONT>            // The following methods are standard SAX ErrorHandler methods.<a name="line.51"></a>
<FONT color="green">052</FONT>            // See SAX documentation for more info.<a name="line.52"></a>
<FONT color="green">053</FONT>    <a name="line.53"></a>
<FONT color="green">054</FONT>            /**<a name="line.54"></a>
<FONT color="green">055</FONT>             *  Prints warning<a name="line.55"></a>
<FONT color="green">056</FONT>             *<a name="line.56"></a>
<FONT color="green">057</FONT>             *@param  spe               The SAX Parser Exception thrown<a name="line.57"></a>
<FONT color="green">058</FONT>             *@exception  SAXException  Description of the Exception<a name="line.58"></a>
<FONT color="green">059</FONT>             */<a name="line.59"></a>
<FONT color="green">060</FONT>            public void warning(SAXParseException spe) throws SAXException {<a name="line.60"></a>
<FONT color="green">061</FONT>                    out.println("Warning: " + getParseExceptionInfo(spe));<a name="line.61"></a>
<FONT color="green">062</FONT>            }<a name="line.62"></a>
<FONT color="green">063</FONT>    <a name="line.63"></a>
<FONT color="green">064</FONT>    <a name="line.64"></a>
<FONT color="green">065</FONT>            /**<a name="line.65"></a>
<FONT color="green">066</FONT>             *  Prints error<a name="line.66"></a>
<FONT color="green">067</FONT>             *<a name="line.67"></a>
<FONT color="green">068</FONT>             *@param  spe               The SAX Parser Exception thrown<a name="line.68"></a>
<FONT color="green">069</FONT>             *@exception  SAXException  Description of the Exception<a name="line.69"></a>
<FONT color="green">070</FONT>             */<a name="line.70"></a>
<FONT color="green">071</FONT>            public void error(SAXParseException spe) throws SAXException {<a name="line.71"></a>
<FONT color="green">072</FONT>                    String message = "Error: " + getParseExceptionInfo(spe);<a name="line.72"></a>
<FONT color="green">073</FONT>                    throw new SAXException(message);<a name="line.73"></a>
<FONT color="green">074</FONT>            }<a name="line.74"></a>
<FONT color="green">075</FONT>    <a name="line.75"></a>
<FONT color="green">076</FONT>    <a name="line.76"></a>
<FONT color="green">077</FONT>            /**<a name="line.77"></a>
<FONT color="green">078</FONT>             *  Prints fatal error<a name="line.78"></a>
<FONT color="green">079</FONT>             *<a name="line.79"></a>
<FONT color="green">080</FONT>             *@param  spe               The SAX Parser Exception thrown<a name="line.80"></a>
<FONT color="green">081</FONT>             *@exception  SAXException  Description of the Exception<a name="line.81"></a>
<FONT color="green">082</FONT>             */<a name="line.82"></a>
<FONT color="green">083</FONT>            public void fatalError(SAXParseException spe) throws SAXException {<a name="line.83"></a>
<FONT color="green">084</FONT>                    String message = "Fatal Error: " + getParseExceptionInfo(spe);<a name="line.84"></a>
<FONT color="green">085</FONT>                    throw new SAXException(message);<a name="line.85"></a>
<FONT color="green">086</FONT>            }<a name="line.86"></a>
<FONT color="green">087</FONT>    }<a name="line.87"></a>
<FONT color="green">088</FONT>    <a name="line.88"></a>




























































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